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Sheep, Goats, A Donkey Arrive at O'Hare Airport To Help Maintain Airfield

CHICAGO (CBS)-- It's a sign of summer at O'Hare International Airport.

A herd of 30 grazing animals arrived Friday to help clear overgrown vegetation around the airfield. The herd included sheep, goats and a donkey.

This is the sixth year for the program, which city officials say is an eco-friendly way of keeping the airfield safe and maintained.

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